Rotary bolt



(No Model.)

J. H. WALSH. ROTARY BOLT.

UNITED STATES PATENT OFFICE.

JOHN H. IVALSl-I, OF MASON CITY, IOIVA.

ROTARY BOLT.

SPECIFICATION forming part of Letters Patent No. 410,661, datedSeptember 10,1889. Application filed August 29, 1887. $erial No.248,103. (No model.)

To all whom, it may concern:

Be it known, that I, JOHN H. ALSH, a citizen of the United States,residing at Mason City, in the county of Cerro Gordo and State of Iowa,have invented certain new and useful Improvements in Flour-Dressers, ofwhich the following is a specification.

This invention relates to flour-dressing machinery, particularly thatclass commonly known as flour-bolts, and is specially applicable tobolts in which the stock is carried around inside the reel by anelevator traveling in the same direction and at about the same speed asthe reel.

The object of this invention is to prevent the dropping of the stockfrom the elevator troughs or buckets as they approach the upper part ofthe reel to the lower part of the reel, which spilling of the stock hasa tendency to render the bolting of the flour uneven and imperfect. ThisI accomplish by the novel arrangement of an apron adapted to hold orcatch the spilled flour, as hereinafter fully set forth.

In the accompanying drawings, forming a part of this specification,Figure 1 represents an end view of the invention in its simplest form;Fig. 2, a similar view of a modified form thereof; Fig. 3, a sideelevation of one end of the form shown in Fig. 1, with a longitudinalsection of a corresponding portion of the reel and its connections; Fig.I, a similar view of the form shown in Fig. 2; Fig. 5, afragmentary sideelevation of still another modification; and Fig. 6, a fragmentary viewof the apron and chain belt, showing a simple manner of connecting themin their application to the form shown in Figs. 2 and 4..

Similar letters of reference indicate corresponding parts.

The invention is represented as attached to a novel form of bolt, whichis particularly described in my former application for Letters Patentfiled April 25, 1887.

In general terms, the bolt consists of a reel A, having end ringsadapted to revolve on the inwardly -projecting flanges of stationaryheads B B, secured to a suitable frame 0. \Vithin this reel, the ends ofwhich are open, is mounted on suitable wheels an elevator D. In itssimplest form this elevator consists of long troughs d a, attached tochain belts Z) l), engaging with the sprocket-wheels c 0, whose shaftsare actuated by mechanism forming a part of that which revolves the reeland is designed to impel the reel and the elevator in the sanfedirection and at about the same rate of speed.

Stock is introduced through a suitable spout I to a conveyer-trough G,mounted inside and extending the full length of the reel, with an outletspoutJ at the tail end. In this trough is mounted a conveyer F, of theusual style, actuated by gearing at the tail of the reel. Above theconveyer is a revolving brush H, in contact with the inside of the reeland adapted to brush off any stock that may be attached thereto anddeposit the same in the conveyer-trough. The direction of the revolutionof the brush and conveyer is indicated by arrows. In its revolution theconveyer moves the stock over the edge of the trough nearer the reel,the coarse residue passing out finally at the tail of the same. Motionis imparted to the reel in the direction indicated by the arrows by apinion K, meshing with the internal gear of the end ring of the reel andmounted on the main drivingshaft L.

The object of this construction, as stated in my said formerapplication, is, by carrying the stock along the ascending side of thereel, to increase the bolting capacity thereof, and by simplyholding thestock in contact with the reel, the motion of the reel and elevatorcorresponding, to make the bolting as gentle and natural as possible;but where the elevator consists simply of these troughs mounted on chainbelt, and the whole space between the upper and lower part of theelevator is open, there is some tendency on the part of the elevator tospill a part of the stock out of the back sides of the troughs as theyare reversing at the top, and this, falling to the bottom of the reel,disturbs the otherwise even and gentle action of the bolt. To removethis difiiculty I have devised the apparatus shown in the accompanyingdrawings, and which I will now describe.

The device is very simple, consisting, essentially, of an apron E,arranged within or forming a part of the elevator. This apron is made ofclose canvas or other suitable material adapted to prevent the passagethrough it of flour. In Figs. 1 and 3 the apron forms a part of theelevator, the troughs or buckets of which are attached directly to it.As chain belt would not be suitable in such a case, the elevator isactuated by broad-faced pulleys, upon which the elevator-apron ismounted the same as an ordinary leather belt. In this case the troughsmay be simply strips of angle-iron attached to the apron, as indicatedin Figs. 1 and In the form shown in Fig. at the apron also forms a partof the elevator, but in this case is attached to the chain belt. Asimple manner of attaching is shown in Fig. 6. The link I) has a laterallug n, with a hole therein, and to this lug the apron is secured by arivet I, as shown.

Instead of making the apron a part of the elevator, however, it may bearranged inside the elevator, as represented in Figs. 2 and 5. In thiscase it is permanently attached to the heads or to some other convenientpart of the bolt. In Fig. 5 is shown more clearly than in Fig. 2 a meansfor fastening the apron in place. This is an internal hoop d, to whichthe apron is secured by rivets or the like. By means of lugs atintervals on this hoop it is fastened to the head I5. A flange would ofcourse answer the same purpose as the lugs t' i. In Fig. 2 this apron isrepresented as forming a complete circuit inside the elevator. It isnot, however, absolutely necessary that it should go entirely around,but should go far enough to prevent the iiour spilled from theelevator-buckets from falling to the bot tom of the reel. Being insidethe elevator and extending the whole length of the bolt, it is necessarythat provision should be made for the operation of the sprocket-wheelsupon which the elevator revolves. This'is done by cutting holes in theapron, as shown at f in Fig. 5, through which the are of the wheelprojects.

In the operation of the reel the stock enters the conveyentrough throughthe inletspout, as already described, and is carried by said conveyerover the edge of the trough next the reel, falling thence to the lowestpart of the reel. Here it is caught by the buckets of the elevatormoving in the same direc-- tion as the reel and carried up on theascending side of the same to about the horizontal center, whence anyunbolted residue is carried forward to the opposite side of the reel anddelivered again to the conveyer.

I am aware that it is not broadly new to combine in a reel an elevatoradapted to carry the stock up the side of the reel and an apron adaptedto prevent the stock discharged by the elevator from falling to thebottom of the reel, and I do not wish to be understood as claiming sucha combination in general; but I am not aware that an apron adapted tocatch spilled stock has hitherto been used in connection with anelevator operating inside and independent of the reel at about, thoughnot necessarily, the same rate of speed and having buckets adapted tocarry the stock from the ascending to the descending side of the same.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a flour-bolt, the combination, with a round reel having anunobstructed bolting surface on the inside adapted to allow for themovement in close proximity thereto, of an independent elevator mountedand operating inside said reel, an elevator with buckets thereon adaptedto carry up the stock on the ascending side of the reel in closeproximity thereto and carry the unbolted residue of stock across fromthe ascending to the descending side, and an apron interposed be tweenSftltlGlGVZttOl and the lower part of the reel to prevent any stockspilled from the buckets falling to the bottom of said reel,substantially as set forth.

2. The combination, with a substantially cylindrical flour-bolt havingan unobstructed internal bolting-surface, of an elevator, substantiallyas described, mounted and revolving inside of and independently of saidreel, but at about the same rate of speed, and adapted to carry up thestock on the ascending side of the reel in close proximity thereto andthe unbolted residue across the reel to the descending side, and a fixedapron mounted inside the path of said elevator and adapted to catch anystock spilled from the buckets of the elevator, substantially asdescribed.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN H. \VALSII.

NVitnesses:

ARTHUR H. CHETLUM, F. H. CULVER.

IOO

